Alert archive / Delaware / Special Weather Statements in 2010

Special Weather Statement, NWS Philadelphia/Mount Holly

July 19, 2010Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 19, 2010, 7:21 PM EDT for Kent County, Delaware. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 19, 2010, 7:21 PM EDT (23:21 UTC)
Expired: Jul 19, 2010, 8:15 PM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 64 km from the middle of the area, began a volume at 23:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.4 hours before the alert went out and 41 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 775 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 883 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

094 
WWUS81 KPHI 192321
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
721 PM EDT MON JUL 19 2010

DEZ001-002-MDZ008-012-015-020-NJZ016-021-200015-
CAROLINE MD-CECIL MD-CUMBERLAND NJ-KENT MD-KENT DE-NEW CASTLE DE-
QUEEN ANNE'S MD-SALEM NJ-
721 PM EDT MON JUL 19 2010

...STRONG THUNDERSTORMS WILL AFFECT CAROLINE...CECIL...CUMBERLAND...
KENT...NEW CASTLE...QUEEN ANNE'S AND SALEM COUNTIES...

AT 718 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST OF
MIDDLETOWN TO 15 MILES WEST OF MIDDLETOWN TO 18 MILES NORTH OF
CENTERVILLE...MOVING EAST AT 25 MPH. THE THUNDERSTORMS WILL BE NEAR
STARKEY CORNER...KENNEDYVILLE AROUND 730 PM...PORT PENN...WARWICK
AROUND 745 PM...MASSEY...SUDLERSVILLE AROUND 800 PM...CLAYTON AND
SMYRNA AROUND 815 PM.

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS.

LAT...LON 3955 7603 3955 7555 3946 7558 3940 7551
      3942 7547 3946 7555 3950 7557 3955 7553
      3955 7530 3929 7531 3941 7547 3939 7551
      3924 7538 3915 7540 3904 7536 3904 7603
      3941 7603 3951 7599

$$

HAYES

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 6:58 AM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	62 min
Jul 19, 7:20 AM EDT	Special Weather Statement	PHI	Morris	55 min
Jul 19, 8:47 AM EDT	Special Weather Statement	PHI	Camden	58 min
Jul 19, 9:07 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	53 min
Jul 19, 9:44 AM EDT	Special Weather Statement	PHI	Burlington, Ocean	61 min
Jul 19, 10:05 AM EDT	Special Weather Statement	PHI	Camden, Gloucester	55 min
Jul 19, 10:15 AM EDT	Special Weather Statement	PHI	Monmouth	60 min
Jul 19, 10:18 AM EDT	Special Marine Warning	PHI		57 min
Jul 19, 10:20 AM EDT	Special Weather Statement	PHI	Atlantic, Camden, Cumberland	55 min
Jul 19, 10:40 AM EDT	Severe Thunderstorm Warning	PHI	Monmouth	21 min
Jul 19, 10:43 AM EDT	Special Marine Warning	PHI		32 min
Jul 19, 4:42 PM EDT	Special Weather Statement	PHI	Sussex	48 min
Jul 19, 4:58 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	28 min
Jul 19, 5:24 PM EDT	Special Weather Statement	PHI	Warren	51 min
Jul 19, 6:20 PM EDT	Special Weather Statement	PHI	Morris	40 min
Jul 19, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester, Salem	53 min
Jul 19, 6:52 PM EDT	Special Weather Statement	PHI	Salem	68 min
Jul 19, 7:40 PM EDT	Special Weather Statement	PHI	Burlington, Camden	65 min
Jul 19, 5:15 AM EDT	Special Weather Statement	PHI	Berks	60 min
Jul 19, 6:04 AM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh, Monroe, Montgomery, Northampton	56 min
Jul 19, 7:46 AM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	59 min
Jul 19, 8:19 AM EDT	Special Weather Statement	PHI	Montgomery	56 min
Jul 19, 2:09 PM EDT	Special Weather Statement	PHI	Carbon	51 min
Jul 19, 2:21 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	54 min
Jul 19, 4:24 PM EDT	Special Weather Statement	PHI	Carbon	36 min
Jul 19, 5:11 PM EDT	Special Weather Statement	PHI	Monroe	49 min
Jul 19, 5:25 PM EDT	Special Weather Statement	PHI	Chester, Delaware, Montgomery	65 min
Jul 19, 5:39 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	66 min
Jul 19, 6:34 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	56 min
Jul 19, 6:57 PM EDT	Special Weather Statement	PHI	Berks, Lehigh, Northampton	48 min
Jul 18, 11:12 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	93 min
Jul 19, 12:00 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	60 min
Jul 19, 9:14 AM EDT	Special Weather Statement	PHI	New Castle	61 min

Nearby

Special Weather Statements in Delaware, 2010 Every special weather statement in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.